import java.util.ArrayList;
 class MyArrayList<T>{
     public boolean add(T e){
         return true;
     }
     public T get(int index){
         return null;
     }
 }
public class GenericityStudy {
    public static void main(String[] args) {
       /* ArrayList<String> list1=new ArrayList();
        list1.add("猫");*/
        MyArrayList<String> list=new MyArrayList();
        list.add("zhangsan ");
    }
}
